Coda is the most beautiful website editing suite I’ve ever used. That’s not to say I used it for everything. To be honest, functionally it wasn’t all that better than several other apps. It was the extra, fancy touches that made the experience nice. I won’t go into specifics here- maybe I’ll spotlight those later.
Migration Score
GOOD
Migration Options
Firebug
Coda does nothing for you that other things can't do. It's the integration and experience that are the killers here. But if you needed to move (or even use something else at the same time) Coda does nothing in a way that forces you to keep using it.